The correct answer is: B) Legendary heroes.
Vadakkan Pattukal (Northern Ballads) are a genre of Tamil folk literature that tell stories of legendary heroes. They are typically set in the ancient Tamil country and feature heroes who are larger than life and often have supernatural powers. The ballads are often sung or recited to the accompaniment of a drum or other musical instrument.
Option A is incorrect because Vadakkan Pattukal do not typically tell stories of seafaring adventures.
Option C is incorrect because Vadakkan Pattukal do not typically tell stories of mythological tales.
Option D is incorrect because Vadakkan Pattukal do not typically tell stories of romantic love.